Automatic noise elimination method in teaching scene

A technology of noise cancellation and scene, applied in the direction of sounding equipment, instruments, etc., can solve the problem of limited noise reduction range and effect.

Inactive Publication Date: 2017-01-25
董涛
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  • Automatic noise elimination method in teaching scene
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Embodiment Construction

[0043] like figure 1 As shown, according to a preferred embodiment of the present invention, the present invention provides an automatic noise elimination method in a teaching scene, which is used for noise attenuation by means of an automatic noise elimination system for a teaching environment. The automatic noise elimination system for a teaching environment includes: A teaching scene noise detection unit, at least one fixed noise generating unit, at least one mobile noise source, and a teaching scene noise reduction device, wherein the teaching scene noise detection unit detects the noise generated by the fixed noise source and the mobile noise source decibels, and control the teaching scene noise reduction equipment to perform active noise reduction, the method includes:

[0044] (1) Detect the noise decibel number in the predetermined area of ​​the teaching scene;

[0045] (2) comparing the detected noise decibel number with a preset threshold;

[0046] (3) According to...

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Abstract

In order to improve the noise elimination effect in the teaching scene, especially to improve the noise reduction effect in a certain natural range, the invention provides an automatic noise elimination method in a teaching scene, comprising: (1) detecting the noise decibels within a predetermined area in the teaching scene; (2) comparing the detected noise decibels with a preset threshold value; and (3) subjecting the stationary noise source and the moving noise source to active noise reduction based on the comparison result. The automatic noise elimination method of the invention is capable of performing active noise reduction on the autonomous moving noise source and overcoming the shortcomings of the prior art in which the technical scheme which can only be used for noise reduction on stationary noise sources is not suitable for practical application, so that the user's noise reduction methods and scope control methods can be expanded, with a broad scope of application and stronger practicality.

Description

technical field [0001] The present invention relates to the field of noise processing, and more specifically, to an automatic noise elimination method in a teaching scene. Background technique [0002] Active noise reduction refers to the technology of collecting environmental noise and generating a signal that is inverse to the noise and playing it back with a noise reduction device to offset the noise. The noise reduction system of a typical active noise reduction (ANC) headset consists of the following parts: 1) a microphone system for collecting noise; 2) an electronic control part for processing sound signals and generating noise reduction signals; 3) speakers A system for generating a noise-reduced sound signal. Most ANC systems employ one of two main structures: feedforward or feedback. For example, in the prior art, for example, Japanese Patent Publication No. JP078558A discloses a comfortable sleep device, including: a first sound pressure monitor located on both ...

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Application Information

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IPC IPC(8): G10K11/178
CPCG10K11/178
Inventor 董涛
Owner 董涛
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